Dallman
Sangamon County, Illinois · EIA plant ID 963 · Operator: City of Springfield - (IL)
×388 MW coal retired since 2020 (latest Mar 2024)
Nameplate230MWSummer 209 MW
Generators1in service
Net generation817GWh12 mo to Aug 2026
Capacity factor45%gas/coal/oil units, summer MW
Heat rate11,604Btu/kWhfossil units, electric fuel, HHV
First online2009Runs as intermediate
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 1,868.5 | 57.3% | 11,522 |
| 2002 | 1,796.1 | 55.1% | 11,140 |
| 2003 | 1,757 | 53.9% | 11,289 |
| 2004 | 1,934.6 | 59.0% | 11,358 |
| 2005 | 2,084.1 | 63.8% | 11,479 |
| 2006 | 1,782.5 | 54.5% | 11,687 |
| 2007 | 1,759.6 | 53.7% | 11,631 |
| 2008 | 1,439.2 | 44.0% | 10,797 |
| 2009 | 1,835.6 | 43.0% | 11,970 |
| 2010 | 2,552 | 52.4% | 11,530 |
| 2011 | 2,267.4 | 46.6% | 11,456 |
| 2012 | 1,953.7 | 41.6% | 11,772 |
| 2013 | 2,378.3 | 50.8% | 11,214 |
| 2014 | 2,346.7 | 50.2% | 11,201 |
| 2015 | 1,928.6 | 41.2% | 11,560 |
| 2016 | 1,785.4 | 38.1% | 11,857 |
| 2017 | 2,388.2 | 51.0% | 11,347 |
| 2018 | 2,355.8 | 50.4% | 11,623 |
| 2019 | 1,853.9 | 40.1% | 11,744 |
| 2020 | 755.9 | 18.4% | 11,992 |
| 2021 | 1,225 | 39.4% | 11,079 |
| 2022 | 1,250.3 | 38.8% | 10,587 |
| 2023 | 643.1 | 20.2% | 12,052 |
| 2024 | 547.2 | 27.0% | 12,379 |
| 2025 | 900.9 | 49.1% | 11,622 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 4 | Conventional Steam Coal | ST | 230.1 | 209.3 | May 2009 | Operating | — | coming soon |
| 1 | Conventional Steam Coal | ST | 90.2 | 64 | Jun 1968 | Retired Dec 2020 | — | coming soon |
| 2 | Conventional Steam Coal | ST | 90.2 | 60 | Jun 1972 | Retired Dec 2020 | — | coming soon |
| 3 | Conventional Steam Coal | ST | 207.3 | 159 | Jun 1978 | Retired Mar 2024 | — | coming soon |
Owner / operator
Operator: City of Springfield - (IL). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of Springfield - (IL) | 100.0% | 230 MW |
Nearby plants
Within 80 km.
| Lakeside | 5 MW | 0.3 km |
| Reynolds | 18 MW | 6.7 km |
| Interstate | 139 MW | 7.7 km |
| Factory | 27 MW | 8.5 km |
| Lincoln Land Energy Center | — | 19.7 km |
| Kincaid Generation LLC | 1,319 MW | 20.4 km |